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Make a 2 speed fan from an Intel stock cooler?

Discussion in 'General Electronics Discussion' started by s355, Apr 13, 2021.

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  1. s355

    s355

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    Apr 13, 2021
    I have an Intel E29477-002 stock cooler laying around and I want to turn it into a 9v battery powered fan with a Low/Off/High SP3T switch. I tried to reduce the voltage to 5v on the low setting, but it made a high pitched humming noise while spinning at the low speed. On the high setting it spins at full speed without issue. How do I remake the circuit so the fan doesn't hum on the low setting?
     
    Last edited: Apr 13, 2021
  2. s355

    s355

    2
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    Apr 13, 2021
    Last edited by a moderator: Apr 13, 2021
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